Furnace-front.



JfH.HUME.

FURNAGE FRONT.

APPLICATION FILED MAR. 30, 1912. 1 ,O48,97(),v Patented Dec.l 31, 1912.

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UNITED STATES PATENT OFFICE.

JAMES HOWDEN HUME, OF GLASGOW, SCOTLAND.

FURNACE-FRONT.

To all whom t may concern:

Be it known that I, JAMES HOWDEN I-IUME, a subject of the King of theUnited Kingdom of Great Britain and Ireland, and residing at Glasgow,Scotland, have invented a certain new and useful Improvement inFurnace-Fronts, of which the following is a specification.

This invention, which is an improvement on or modication of thatdescribed in the specication of Letters Patent No. 1019155, relates toimprovements in the fronts of furnaces designed particularly for burningliquid fuel but also suitable for burning solid fuel.

In the construct-ion embodying the invention the usual Lipper auxiliaryair-supply valve referred to in said specification is dispensed with,and the auxiliary air-supply is admitted to the furnace through anopening at the underside of the firing entrance, which opening may befully open when liquid fuel is used but partly closed when solid fuel isused, the area of the air opening being regulated by adjustment of amovable (and also removable) base portion which only partly ills a gapformed in the underside of the firing entrance.

The invention is illustrated in the accompanying drawings in which-Figure l is a part elevation part vertical section and Fig. 2 is a crosssection showing a furnace front fitted with a removable base portion asaforesaid.

Referring to the drawings, the furnace front A is fitted as usual withside air-supply valves B mounted on a rotatable spindle C, or otherwiseoperated, the aforesaid upper auxiliary air-supply valve being dispensedwith. A gap is formed in the underside of the firing entrance, which gapserves for admission of a large quantity of air when liquid fuel isused. The said gap may be partly closed by the removable base por-Specication of Letters Patent.

Application filed March 30, 1912.

Patented Dec. 31, 1912. Serial No. 687,403.

tion D so that when said base portion is in place, z'. e., when solidfuel is used, a restricted opening is formed through which an auxiliarysupply of air from the side valves B may pass by way of the firingentrance to the furnace A which is shown equipped with the rebars A2,the main supply of air passing from beneath the firebars A2 to thefurnace.

The base portion D is adjustable to permit regulation of the area of theauxiliary air opening. In the construction shown the base portion ismovable longitudinally of the furnace, said base portion resting onledges E and being provided with a strengthening rib or ange F and beingmovable relatively to said ledges to regulate the auxiliary air supplyto the furnace.

Having now described my invention what I claim and desire to secure byLetters Patent of the United States is In a furnace, the combinationwith a furnace front provided at its sides with valves serving tocontrol or regulate a forced draft supply of air to the furnace, saidfront having between said valves a firing entrance and a space or gapadjacent said entrance arranged to permit an auxiliary forced-draftsupply of air to said furnace, and a door for closing said firingentrance, of a base portion removably located in said space or gap, saidbase portion only partly filling said space or gap and being movable oradjustable therein and coperating with said door` to regulate saidauxiliary air supply.

In testimony whereof I have signed my name to this specication in thepresence of two subscribing witnesses.

JAMES HOVDEN HUME.

Witnesses:

WALLACE FAIRWEATHER, JOHN M. CLEARY.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, ID. C.

